@article{10_14708_cm_v9i2_5548,
     author = {W. Gorzkowski},
     title = {O okresowo\'sci pewnych ci\k{a}g\'ow liczb naturalnych},
     journal = {Commentationes Mathematicae},
     pages = { 201--206},
     year = {1965},
     volume = {9},
     number = {2},
     doi = {10.14708/cm.v9i2.5548},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v9i2.5548/}
}